39039920 ÷ 574 
The aim is to understand the frequency of 574 in 39039920.

Advancing to step 1:
When dividing 3 by 574, we get 0 with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 574

Advancing to step 2:
574 goes into 39 0 times with a remainder of 39.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 39, we end up with 39.
Include the next digit (0) from the dividend after 39, then repeat: 390 / 574

On to step 3:
574 can be fit into 390 0 times, resulting in a remainder of 390.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 390 to get 390.
Append the next digit (3) from the dividend to 390 and continue with: 3903 / 574

Going ahead to step 4:
3903 divided by 574 is 6 with a remainder of 459.
Put 6 as the next digit of the answer. 
Result so far: 6.0
If we subtract 3444 from 3903, we get 459.
Include the next digit (9) from the dividend after 459, then repeat: 4599 / 574

On to step 5:
When dividing 4599 by 574, we get 8 with a remainder of 7.
Put 8 as the next digit of the answer. 
Result so far: 68.0
Deduct 4592 from 4599 and we're left with 7.
Take the next digit (9) from the dividend and append it to 7, then repeat: 79 / 574

Going ahead to step 6:
The number 574 fits into 79 0 times, leaving a remainder of 79.
Record the quotient 0 as the next digit in the result. 
Result so far: 680.0
Deduct 0 from 79 and we're left with 79.
Take the next digit (2) from the dividend and append it to 79, then repeat: 792 / 574

Going ahead to step 7:
The number 574 fits into 792 1 times, leaving a remainder of 218.
Put 1 as the next digit of the answer. 
Result so far: 6801.0
If we take 574 away from 792, we end up with 218.
Include the next digit (0) from the dividend after 218, then repeat: 2180 / 574

On to step 8:
When dividing 2180 by 574, we get 3 with a remainder of 458.
Record the quotient 3 as the next digit in the result. 
Result so far: 68013.0
If we subtract 1722 from 2180, we get 458.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4580, and continue the process.

Step 9:
When dividing 4580 by 574, we get 7 with a remainder of 562.
The number 7 becomes the next digit in our result. 
Result so far: 68013.7
Deduct 4018 from 4580 and we're left with 562.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5620, and continue the process.

Going ahead to step 10:
5620 divided by 574 is 9 with a remainder of 454.
Use 9 as the next digit of our solution. 
Result so far: 68013.79
If we take 5166 away from 5620, we end up with 454.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4540, and continue the process.

Step 11:
When dividing 4540 by 574, we get 7 with a remainder of 522.
Use 7 as the next digit of our solution. 
Result so far: 68013.797
Subtracting 4018 from 4540 leaves us with 522.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5220, and continue the process.

Advancing to step 12:
When dividing 5220 by 574, we get 9 with a remainder of 54.
The number 9 becomes the next digit in our result. 
Result so far: 68013.7979
Subtracting 5166 from 5220 leaves us with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

On to step 13:
If we divide 540 by 574, we get 0 and a remainder of 540.
Use 0 as the next digit of our solution. 
Result so far: 68013.7979
If we subtract 0 from 540, we get 540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5400, and continue the process.

On to step 14:
When dividing 5400 by 574, we get 9 with a remainder of 234.
The next digit of our result is 9. 
Result so far: 68013.797909
Subtract 5166 from 5400 to get 234.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2340, and continue the process.

Moving on to step 15:
The number 574 fits into 2340 4 times, leaving a remainder of 44.
The next digit of our result is 4. 
Result so far: 68013.7979094
Subtracting 2296 from 2340 leaves us with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Step 16:
574 can be fit into 440 0 times, resulting in a remainder of 440.
Use 0 as the next digit of our solution. 
Result so far: 68013.7979094
If we subtract 0 from 440, we get 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

Our division results in 68013.7979094 with a remaining 4.4e-07.